1004436221 has 2 divisors, whose sum is σ = 1004436222. Its totient is φ = 1004436220.

The previous prime is 1004436193. The next prime is 1004436227. The reversal of 1004436221 is 1226344001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 941630596 + 62805625 = 30686^2 + 7925^2 .

It is an emirp because it is prime and its reverse (1226344001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004436221 - 2⁶ = 1004436157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004436227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502218110 + 502218111.

It is an arithmetic number, because the mean of its divisors is an integer number (502218111).

Almost surely, 2^1004436221 is an apocalyptic number.

It is an amenable number.

1004436221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004436221 is an equidigital number, since it uses as much as digits as its factorization.

1004436221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1004436221 is about 31692.8417943232. The cubic root of 1004436221 is about 1001.4765590337.

The spelling of 1004436221 in words is "one billion, four million, four hundred thirty-six thousand, two hundred twenty-one".